Cancer diagnoses are shifting from older to younger adults and from men to women, according to a report released Thursday by the American Cancer Society.

Women are now being diagnosed with cancer more often than men in certain age groups, according to a new report from the American Cancer Society. Among adults aged 50-64, cancer rates are slightly higher in women, and women under 50 are almost twice as likely as men in the same age group to receive a cancer diagnosis.

The increase in breast cancer rates among younger patients is occurring as the incidence of other early-onset cancers — including colorectal, gastric, kidney and liver cancer — is also on the rise, though cancer among patients under 50 is still relatively rare overall, Dr. Partridge said.

The cancer death rate declined by more than one-third over a three-decade period in the United States, though incidence rates for many types of cancer are rising in women and young adults, according to a new report.

Cancer cases are shifting from men to women in the U.S., and from older to younger adults, according to a new report from the American Cancer Society.

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The American Cancer Society's report shows a mix of lower death rates and rising cancer incidence rates for some groups, especially younger women.